Author: Sharon A. Warren
Publisher:
ISBN: 9780967499017
Category : Meditation
Languages : en
Pages : 0
Book Description
Each book contains a unique set of rare-earth magnets to quickly demonstrate and understand how you attract your heart's desires; how to consistently be a Deliberate Creator; empowering tools that create, activate, and magnetize more joy in EVERY arena of your life (relationships, love, money, career, home). Magnetizing Your Heart's Desire give inspired new visions for your decisions to name and claim your personal power easily and quickly.
Magnetizing Your Heart's Desire
Author: Sharon A. Warren
Publisher:
ISBN: 9780967499017
Category : Meditation
Languages : en
Pages : 0
Book Description
Each book contains a unique set of rare-earth magnets to quickly demonstrate and understand how you attract your heart's desires; how to consistently be a Deliberate Creator; empowering tools that create, activate, and magnetize more joy in EVERY arena of your life (relationships, love, money, career, home). Magnetizing Your Heart's Desire give inspired new visions for your decisions to name and claim your personal power easily and quickly.
Publisher:
ISBN: 9780967499017
Category : Meditation
Languages : en
Pages : 0
Book Description
Each book contains a unique set of rare-earth magnets to quickly demonstrate and understand how you attract your heart's desires; how to consistently be a Deliberate Creator; empowering tools that create, activate, and magnetize more joy in EVERY arena of your life (relationships, love, money, career, home). Magnetizing Your Heart's Desire give inspired new visions for your decisions to name and claim your personal power easily and quickly.
Motor design for maximum material exploitation and magnetization procedure with in-line quality check for mass production
Author: Dinca, Christian
Publisher: Universitätsverlag der TU Berlin
ISBN: 3798328838
Category : Technology & Engineering
Languages : en
Pages : 187
Book Description
To reduce the amount of Rare-earth Elements in high efficient permanent magnet electric motors, the magnetic stray flux has to be reduced. Additonally, a temperature reduction inside the motor reduces the necessary amount of the so called Heavy Rare-earth Elements, which account for the bulk part of the magnet material costs. In this thesis a permanent magnet motor in wet rotor configuration for an automotive application is designed. It was shown that by simple thermal improvements of the electric insulation system the maximum temperature of the stator can be reduced. Extensive measurements on different combinations of insulation material of the stator and the development of a new thermal model for orthocyclic wound stators were performed. Due to the use of fiber cans eddy current losses could be eliminated and the stray flux minimized. In a second stage a magnetizing fixture was build up, which is able to magnetize the buried magnets inside the rotor. The rotor and the magnetizing fixture was developed, so that the magnets can be optimal magnetized. To check the quality of the magnets the magnetizing coil was developed in a way, such that the hysteresis curve of every single magnet during magnetization can be measured. Different magnets were tested and ways to calculate parasitics are given. Um die Menge an Selten Erden in hoch-effizienten permanent erregten Elektromotoren zu reduzieren, muss der magnetische Streufluss verringert werden. Eine Temperaturreduktion im Motor verringert zudem die nötige Menge an so genannten schweren Selten Erden, welche einen Großteil der Kosten der Magnetmaterialien ausmachen. In dieser Arbeit wird dazu ein permanent erregter Nassläufer für eine automotive Anwendung ausgelegt. Es konnte gezeigt werden, dass durch einfache Maßnahmen im Bereich der elektrischen Isolation die maximale Temperatur im Stator reduziert werden konnte. Umfangreiche Messungen an verschiedenen Kombinationen von elektrischen Isolationen des Stators und die Entwicklung eines neuen thermischen Models für orthozyklisch gewickelte Statoren wurden getätigt. Durch Einsatz von Spaltrohren aus Faserverbundwerkstoffen konnten die Wirbelstromverluste beseitigt werden und der Streufluss minimiert werden. In einem zweiten Schritt wurde eine Magnetisiervorrichtung aufgebaut, mit der die zu Anfang unmagnetisierten eingebetteten Magneten im Rotor aufmagnetisiert werden konnten. Der Rotor wurde zudem zusammen mit der Magnetisierungsspule so ausgelegt, dass die Magnete optimal magnetisiert werden können. Um die Qualität der Magnete zu testen wurde die Magnetisierspule zudem so ausgelegt, dass eine Messung der Hysteresekurve jedes einzelnen Magneten während der Magnetisierung möglich ist. Verschiedene Magnete wurden vermessen und Möglichkeiten zur Bestimmung von parasitären Effekten gegeben.
Publisher: Universitätsverlag der TU Berlin
ISBN: 3798328838
Category : Technology & Engineering
Languages : en
Pages : 187
Book Description
To reduce the amount of Rare-earth Elements in high efficient permanent magnet electric motors, the magnetic stray flux has to be reduced. Additonally, a temperature reduction inside the motor reduces the necessary amount of the so called Heavy Rare-earth Elements, which account for the bulk part of the magnet material costs. In this thesis a permanent magnet motor in wet rotor configuration for an automotive application is designed. It was shown that by simple thermal improvements of the electric insulation system the maximum temperature of the stator can be reduced. Extensive measurements on different combinations of insulation material of the stator and the development of a new thermal model for orthocyclic wound stators were performed. Due to the use of fiber cans eddy current losses could be eliminated and the stray flux minimized. In a second stage a magnetizing fixture was build up, which is able to magnetize the buried magnets inside the rotor. The rotor and the magnetizing fixture was developed, so that the magnets can be optimal magnetized. To check the quality of the magnets the magnetizing coil was developed in a way, such that the hysteresis curve of every single magnet during magnetization can be measured. Different magnets were tested and ways to calculate parasitics are given. Um die Menge an Selten Erden in hoch-effizienten permanent erregten Elektromotoren zu reduzieren, muss der magnetische Streufluss verringert werden. Eine Temperaturreduktion im Motor verringert zudem die nötige Menge an so genannten schweren Selten Erden, welche einen Großteil der Kosten der Magnetmaterialien ausmachen. In dieser Arbeit wird dazu ein permanent erregter Nassläufer für eine automotive Anwendung ausgelegt. Es konnte gezeigt werden, dass durch einfache Maßnahmen im Bereich der elektrischen Isolation die maximale Temperatur im Stator reduziert werden konnte. Umfangreiche Messungen an verschiedenen Kombinationen von elektrischen Isolationen des Stators und die Entwicklung eines neuen thermischen Models für orthozyklisch gewickelte Statoren wurden getätigt. Durch Einsatz von Spaltrohren aus Faserverbundwerkstoffen konnten die Wirbelstromverluste beseitigt werden und der Streufluss minimiert werden. In einem zweiten Schritt wurde eine Magnetisiervorrichtung aufgebaut, mit der die zu Anfang unmagnetisierten eingebetteten Magneten im Rotor aufmagnetisiert werden konnten. Der Rotor wurde zudem zusammen mit der Magnetisierungsspule so ausgelegt, dass die Magnete optimal magnetisiert werden können. Um die Qualität der Magnete zu testen wurde die Magnetisierspule zudem so ausgelegt, dass eine Messung der Hysteresekurve jedes einzelnen Magneten während der Magnetisierung möglich ist. Verschiedene Magnete wurden vermessen und Möglichkeiten zur Bestimmung von parasitären Effekten gegeben.
NBS Special Publication
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 100
Book Description
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 100
Book Description
Electrical Engineering
Author:
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 540
Book Description
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 540
Book Description
Power
Author:
Publisher:
ISBN:
Category : Machinery
Languages : en
Pages : 954
Book Description
Publisher:
ISBN:
Category : Machinery
Languages : en
Pages : 954
Book Description
Power and the Engineer
Author:
Publisher:
ISBN:
Category : Machinery
Languages : en
Pages : 950
Book Description
Publisher:
ISBN:
Category : Machinery
Languages : en
Pages : 950
Book Description
Handbook for Electrical Engineers
Author: Harold Pender
Publisher:
ISBN:
Category : Electric engineering
Languages : en
Pages : 2292
Book Description
Publisher:
ISBN:
Category : Electric engineering
Languages : en
Pages : 2292
Book Description
Practical Calculation of Dynamo-electric Machines
Author: Alfred Eugene Wiener
Publisher:
ISBN:
Category : Electric generators
Languages : en
Pages : 794
Book Description
Publisher:
ISBN:
Category : Electric generators
Languages : en
Pages : 794
Book Description
Handbook for Electrical Engineers
Author:
Publisher:
ISBN:
Category : Electric engineering
Languages : en
Pages : 2080
Book Description
Publisher:
ISBN:
Category : Electric engineering
Languages : en
Pages : 2080
Book Description
Fundamentals of Power Electronics
Author: Erickson
Publisher: Springer Science & Business Media
ISBN: 1461576466
Category : Technology & Engineering
Languages : en
Pages : 796
Book Description
In many university curricula, the power electronics field has evolved beyond the status of comprising one or two special-topics courses. Often there are several courses dealing with the power electronics field, covering the topics of converters, motor drives, and power devices, with possibly additional advanced courses in these areas as well. There may also be more traditional power-area courses in energy conversion, machines, and power systems. In the breadth vs. depth tradeoff, it no longer makes sense for one textbook to attempt to cover all of these courses; indeed, each course should ideally employ a dedicated textbook. This text is intended for use in introductory power electronics courses on converters, taught at the senior or first-year graduate level. There is sufficient material for a one year course or, at a faster pace with some material omitted, for two quarters or one semester. The first class on converters has been called a way of enticing control and electronics students into the power area via the "back door". The power electronics field is quite broad, and includes fundamentals in the areas of • Converter circuits and electronics • Control systems • Magnetics • Power applications • Design-oriented analysis This wide variety of areas is one of the things which makes the field so interesting and appealing to newcomers. This breadth also makes teaching the field a challenging undertaking, because one cannot assume that all students enrolled in the class have solid prerequisite knowledge in so many areas.
Publisher: Springer Science & Business Media
ISBN: 1461576466
Category : Technology & Engineering
Languages : en
Pages : 796
Book Description
In many university curricula, the power electronics field has evolved beyond the status of comprising one or two special-topics courses. Often there are several courses dealing with the power electronics field, covering the topics of converters, motor drives, and power devices, with possibly additional advanced courses in these areas as well. There may also be more traditional power-area courses in energy conversion, machines, and power systems. In the breadth vs. depth tradeoff, it no longer makes sense for one textbook to attempt to cover all of these courses; indeed, each course should ideally employ a dedicated textbook. This text is intended for use in introductory power electronics courses on converters, taught at the senior or first-year graduate level. There is sufficient material for a one year course or, at a faster pace with some material omitted, for two quarters or one semester. The first class on converters has been called a way of enticing control and electronics students into the power area via the "back door". The power electronics field is quite broad, and includes fundamentals in the areas of • Converter circuits and electronics • Control systems • Magnetics • Power applications • Design-oriented analysis This wide variety of areas is one of the things which makes the field so interesting and appealing to newcomers. This breadth also makes teaching the field a challenging undertaking, because one cannot assume that all students enrolled in the class have solid prerequisite knowledge in so many areas.